/Engine/Source/Editor/AnimGraph/Public/AnimGraphNode_BlendSpaceGraphBase.h
any sub graphs (graphs that have this node as an outer) that this node might contain (e.g. composite, animation state machine etc.).
virtual [TArray](API\Runtime\Core\Containers\TArray)< [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * > GetSubGraphs() const